/*
 * client.c
 *
 *  Created on: Mar 9, 2009
 *      Author: sethschwiethale
 */

#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>

#define BUFFSIZE 32
void Crash(char *err) { perror(err); exit(1); }


int main(int argc, char *argv[]) {
	int sock;
	struct sockaddr_in echoserver;
	char buffer[BUFFSIZE];
	unsigned int echolen;
	int received = 0;

	if (argc != 4) {
		fprintf(stderr, "Usage: client.o <server_ip> <word> <port>\n");
		exit(1);
	}

	/* Create the TCP socket */
	if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0){
		Crash("could not create socket");
	}

	/* Construct the server sockaddr_in structure */
	memset(&echoserver, 0, sizeof(echoserver));       /* Clear struct */
	echoserver.sin_family = AF_INET;                  /* Internet/IP */
	echoserver.sin_addr.s_addr = inet_addr(argv[1]);  /* IP address */
	echoserver.sin_port = htons(atoi(argv[3]));       /* server port */

	/* Establish connection */
	if (connect(sock, (struct sockaddr *) &echoserver, sizeof(echoserver)) < 0) {
		Crash("could not connect with server");
	}

	/* Send the word to the server */
	echolen = strlen(argv[2]);
	if (send(sock, argv[2], echolen, 0) != echolen) {
		Crash("Mismatch in number of sent bytes");
	}

	/* Receive the word back from the server */
	fprintf(stdout, "Received: ");
	while (received < echolen) {
		int bytes = 0;
		if ((bytes = recv(sock, buffer, BUFFSIZE-1, 0)) < 1) {
			Crash("failure receiving bytes from server");
		}
		received += bytes;
		buffer[bytes] = '\0';        /* terminate with null string */
		fprintf(stdout, buffer);
	}

	fprintf(stdout, "\n");
	close(sock);
	exit(0);
}
